Research on oxidative stress induced by tenuazonic acid from Alternaria augustiovoide and changes in antioxidant enzyme activities in leaves of Echinochloa crus-galli | 渚甸炬煎姣绱缁浜ら惧歌瀵艰姘у杩姘у跺绌
2011
Jiang Shujun, Northeast Agricultural University, Harbin(China), College of Agronomy | Yu Han, Heilongjiang Bayi Agricultural University, Daqing (China), College of Life Science and Technology | Zhang Guoqin, Heilongjiang Bayi Agricultural University, Daqing (China), College of Life Science and Technology
[Objective] The aim of the study was to determine whether phytotoxicity of TeA against Echinochloa crus-galli leaves was correlated with oxidative stress caused by generation of reactive oxygen and the changes of antioxidant enzymes activity. [Method] The changes of malondialdehyde (MDA) content, hydrogen peroxide (H2O2), and activities of superoxide dismutase (SOD), glutathione reductase (GR) and catalase (CAT) were studied by leaf segment method in vitro. [Result] After the treatment of 500 渭mol/L TeA, the content of MDA and H2O2 increased by 247.86% and 67.00%, respectively, indicating that the accumulation of MDA and H2O2 in E. crus-galli leaves was due to the reactive oxygen burst induced by TeA. TeA induced a significant increase in activities of SOD, GR and CAT. At 500 渭mol/L TeA, activities of SOD, GR and CAT increased more than one fold compared with the control. [Conclusion] TeA could not only cause oxidative stress in leaves of E. crus-galli through the induction of reactive oxygen, but also induce the increasing of antioxidant enzyme activity.
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